00310nam a22001217a 4500003000400000005001700004008004100021020001800062040000800080100002000088245004400108260003600152OSt20180723160844.0180723b        xxu||||| |||| 00| 0 eng d  a0-13-182098-2  cn/a  aM. Morris  Mano  aLogic and Computer design Fundermentals  aNew JerseybPrentice Hallc1997